Package org.pgcodekeeper.core.database.ch.parser.expr

Class ChAbstractExprWithNmspc<T>

java.lang.Object

org.pgcodekeeper.core.database.base.parser.antlr.AbstractExpr

org.pgcodekeeper.core.database.ch.parser.expr.ChAbstractExpr

org.pgcodekeeper.core.database.ch.parser.expr.ChAbstractExprWithNmspc<T>

Direct Known Subclasses:

ChExprWithNmspc, ChSelect

public abstract class ChAbstractExprWithNmspc<T>
extends ChAbstractExpr

Abstract class extending ChAbstractExpr with namespace support for SQL expression analysis. Handles table aliases, CTEs (Common Table Expressions) and namespace management.

Method Summary

Modifier and Type	Method	Description
void	addRawTableReference(ObjectReference qualifiedTable)	Adds an unaliased table reference to the namespace.
void	addReference(String alias)	Adds a reference with the given alias
abstract List<String>	analyze(T ruleCtx)	Analyzes the given SQL context and returns a list of processing results.
Map.Entry<String,ObjectReference>	findReference(String schema, String name, String column)

Methods inherited from class org.pgcodekeeper.core.database.base.parser.antlr.AbstractExpr

addDependency, addDependency, addDependency, addReference, addVariable, getDependencies

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

findReference

public Map.Entry<String,ObjectReference> findReference(String schema,
 String name,
 String column)

Overrides:

findReference in class AbstractExpr

Parameters:

schema - optional schema qualification of name, may be null

name - alias of the referenced object

column - optional referenced column alias, may be null

Returns:

a pair of (Alias, Dealiased name) where Alias is the given name. Dealiased name can be null if the name is internal to the query and is not a reference to external table.
null if the name is not found

addReference

public void addReference(String alias)

Adds a reference with the given alias

Parameters:

alias - the alias name to register

addRawTableReference

public void addRawTableReference(ObjectReference qualifiedTable)

Adds an unaliased table reference to the namespace.

Parameters:

qualifiedTable - the table reference to add

analyze

public abstract List<String> analyze(T ruleCtx)

Analyzes the given SQL context and returns a list of processing results. Must be implemented by concrete subclasses.

Parameters:

ruleCtx - the ANTLR context to analyze

Returns:

list of analysis results (implementation-dependent)